Hey,
Some of the colleges that offer Maters of Science in Biotechnology are:
Osmania University college for women
A.V College of Arts Science and Commerce
University of Hyderabad
Osmania University
Government City College
GITAM  School of Science
Institute of Science and Technology
Some of the colleges that offer Masters of Science in Biotechnology in Tamil nadu are:
Loyola College
Stella Maris College
Women's Christian College
Dr. NGP Arts and Science College
Sri Ramakrishna College of Arts and Science
Hindustan College of Arts and Science
Bharathiar University
Admission process is based on entrance exams such as JAM or GATE.
Hope this helps.
Good luck.